Sainte-Adèle was founded in 1855. The winner of the first municipal election was Isidore Legaut, church builder. At the time, council decisions were announced on the church steps by a town crier after Sunday mass. Close to 300 families lived in the vicinity of Sainte-Adèle.
At the beginning of the 20th century, the village divided into two sections: Sainte-Adèle-en-Bas and Sainte-Adèle-en-Haut. The dividing line between the village and the parish is still visible on Blondin and Ouimet Street.